← View Generic U0291 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

U0291: Network Communication Code U0291 - Data Link

on 2021 Honda PASSPORT

Fix Cost
$50 - $300
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2021 Honda
PASSPORT
⚠️

Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does U0291 Mean on 2021 Honda PASSPORT?

Network communication diagnostic trouble code related to data link communication.
⚠️

Symptoms

  • • Communication errors
  • • module malfunctions
  • • system integration failures
  • • CAN bus issues.
🔍

Common Causes

  • • CAN bus faults
  • • module communication errors
  • • wiring problems
  • • connector corrosion.
🛠️

How to Fix U0291 on 2021 Honda PASSPORT

Check CAN bus integrity, test module communication, repair wiring, clean connectors.

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Need Maintenance Info for Your PASSPORT?

Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.

View 2021 Honda PASSPORT Specs

Parts for 2021 Honda PASSPORT

Various - depends on diagnosis Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with U0291

U0289 Sequential Code

Network Communication Code U0289 - Gateway

Medium
U0290 Sequential Code

Network Communication Code U0290 - Network Hub

Medium
U0292 Sequential Code

Network Communication Code U0292 - Protocol Error

Medium
U0293 Sequential Code

Network Communication Code U0293 - Bus Fault

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system